Conmetall Bolt 316 M4 x 30mm, Wing, Galvanised.
Self-drilling screws have a hardened drill point that cuts through steel or timber and taps its own thread in one operation, with no pilot hole. Light section for thin steel; heavy section for thicker steel. Winged versions clear timber before biting into steel below.
Drive with a socket or hex bit. Supplied in a barcoded Conmetall retail prepack.
